Bird Technologies 8640B Series - Manual (Page 12)

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Chapter 1 Introduction
Bird 8640 and 8640B Series Moduloads are self-cooling, nonradiating,
low reflection terminations for high power RF lines. They dissipate up
to 25 kW with a VSWR of less than 1.1:1 from 1 kHz to 900 MHz.
The Moduload has an interlock which triggers as a result of either
high coolant temperature or low coolant flow. It will also be active for
about 2 seconds after power up or reset to ensure proper operation of
the cooling system before applying RF power.
Moduload
Features
y Useable with CW, AM, FM, SSB, and TV modulation, and certain
pulse types. Contact Bird Electronic Corporation for information
on using Moduloads with pulsed signals.
y Useable to make RF power measurements when used with a Bird
4600 or 4800 Thruline Wattmeter
y Self-contained water-based cooling system
y Time-delay interlock ensures steady coolant flow before RF power
is applied
Indicators
y Coolant Level Gauge
Items Supplied
y Moduload
y Instruction Manual
y Power Meter Rack-Mount Kit
Items Required but
not Supplied
y No. 22 AWG wire, with ring terminals, for interlock connection
y RF Coupling Kit
y Ethylene Glycol, Industrial Grade, 1 Gallon - available from Bird
Optional Items
Available
y Dolly (Bird P/N 6771-011) for moving the load